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Income Taxes - Schedule of Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Current: |  |  |
Domestic federal |  | $ 1,167 | $ 54
Foreign | $ 1,278 | (1,404) | 1,330
Foreign withholding taxes | 94 | 356 | 240
Domestic state | 58 | 101 | 120
Total current | 1,430 | 220 | 1,744
Deferred: |  |  |
Domestic federal |  | 0 | 0
Total deferred | 0 | 0 | 0
Total provision | $ 1,430 | $ 220 | $ 1,744

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